NFP_CPP_ISLAND_ID(9)

💅 NFP_CPP_ISLAND_ID(9) — kernel api manual, bestie edition 🎀

okay so this is NFP_CPP_ISLAND_ID, from section 9 of the kernel API manual (yes, the kernel, we're fancy now ✨). sit down, grab a strawberry drink 🍓, and let me tell you about this little macro that's out here packing four whole things into one 32-bit number. main character energy, honestly.

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✨ NAME ✨

NFP_CPP_ISLAND_ID — the macro that packs your target, token, action, and island all into one CPP ID 🫶

🌸 SYNOPSIS 🌸

NFP_CPP_ISLAND_ID (target , action , token , island );

that's it. four args, one macro, zero drama (okay maybe a little drama, it's kernel code 💀).

🦋 ARGUMENTS 🦋

• target — the NFP CPP target id, like… which thing are we even talking to rn 👀
• action — the NFP CPP action id, aka what we're doing to it
• token — the NFP CPP token id, its little name tag 🎀
• island — the NFP CPP island id, where it lives, its whole vibe 🌴

💖 DESCRIPTION 💖

okay so the whole point: this makes a 32-bit CPP identifier that represents the access you're about to make. think of it as a little wristband 🎟️ that says exactly who's going where and what they're doing there.

these identifiers get passed as parameters to other NFP CPP functions — so like, they're everywhere. iykyk.

and here's a lil fun fact that lowkey matters: some CPP devices may allow wildcard identifiers to be specified. so yeah, not every field has to be super specific on every device, no cap 🌈

👑 RETURN 👑

returns an NFP CPP ID 💅 that's the whole thing, literally.

🔥 SEE ALSO 🔥

• kernel file ./drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h — go read the source bestie, it's right there 📖
• NFP_CPP_ID(9)
• NFP_CPP_ID_TARGET_of(9)
• NFP_CPP_ID_TOKEN_of(9)
• NFP_CPP_ID_ACTION_of(9)
• NFP_CPP_ID_ISLAND_of(9)
• NFP_CPP_INTERFACE(9)
• NFP_CPP_INTERFACE_TYPE_of(9)
• NFP_CPP_INTERFACE_UNIT_of(9)
• NFP_CPP_INTERFACE_CHANNEL_of(9)
• nfp_cppcore_pcie_unit(9)
• struct nfp_cpp_operations(9)

like a whole friend group of macros, obsessed 🫶✨

fr fr read the SEE ALSO list — half of it is the unpacking squad for the exact ID you just packed. you pack it with NFP_CPP_ISLAND_ID, you take it apart with the _of ones. it's giving teamwork 💜

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aaaand that's the page!! 🌸 source/version vibes: this one comes from ./drivers/net/ethernet/netrono... (the path got cut off, tragic, but you get it 💀) and it's dated October 2026, filed under Kernel API Manual — mwah, slay, periodt 🎀💅🌟